Javascript: How to validate email address with JavaScript? Javascript: Hvordan kan validere e-postadressen med JavaScript?

Posted on 13. Posted on 13. Jun, 2009 by Dragos in Coding , JavaScript & Ajax Jun 2009 av Dragos i Coding, JavaScript og Ajax

Here's a piece of code I found while I was browsing the JQuery UI pages to easily validate email addresses. Her er en del av koden fant jeg mens jeg surfer på JQuery UI sider for enkelt å validere e-postadresser.

The code below represents a general validation function, that requires two parameters:1. Koden nedenfor representerer en generell validering funksjon, som krever to parametre: 1.. the string value of an obkect and 2. strengverdien en obkect og 2. the regular expression to check the string against det vanlige uttrykket for å se streng mot

 function checkRegexp(o,regexp) { funksjon checkRegexp (o, regulært uttrykk) ( 
         if ( !( regexp.test( o ) ) ) { if (! (regexp.test (o))) ( 
             return false; return false; 
         } else { ) Else ( 
             return true; return true; 
         } ) 
     } )

Now, here's the following code to use in order to validate email addresses: Nå, her følgende kode for å bruke for å validere e-postadresser:

 var regex=/^((([az]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([az]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([az]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([az]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([az]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([az]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([az]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([az]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([az]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([az]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$/i; var regex =/^((([ az] | \ d | [! # \ $% & '\ * \ + \ - \ / = \? \ ^ _ `(\ |}~]|[ \ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF]) + (\. ([az] | \ d | [! # \ $% & '\ * \ + \ - \ / = \? \ ^ _ `(\ |}~]|[ \ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF ])+)*)|(( \ x22 )(((( \ x20 | \ x09) * (\ x0d \ x0a) )? (\ x20 | \ x09 )+)?(([ \ x01-\ x08 \ x0b \ x0c \ x0e-\ x1f \ x7f] | \ x21 | [\ x23-\ x5b] | [\ x5d-\ x7e ] | [\ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF]) | (\ \ ([\ x01-\ x09 \ x0b \ x0c \ x0d-\ x7f] | [\ u00A0-\ uD7FF \ uF900 - \ uFDCF \ uFDF0-\ uFFEF ]))))*((( \ x20 | \ x09) * (\ x0d \ x0a))? (\ x20 | \ x09 )+)?( \ x22 )))@( (([az] | \ d | [\ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF ])|(([ az] | \ d | [\ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0 - \ uFFEF]) ([az] | \ d | - | \ .|_|~|[ \ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF ])*([ az] | \ d | [ \ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF]))) \ .)+(([ az] | [\ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF ])|(( [az] | [\ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF]) ([az] | \ d | - | \ .|_|~|[ \ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF ])*([ az] | [\ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF]))) \.? $ / i; 
 var first=checkRegexp("email@email.",regex); //boolean false, because the email address is missing the tld var første = checkRegexp ( "e @ e-post." regex); / / boolean false, fordi e-postadressen er mangler TLD 
 var second=checkRegexp("email@email.tld",regex); //boolean true var sekund = checkRegexp ( "email@email.tld", regex); / / boolean true

It's good to validate email addresses right on the client side, because you save server resources consumption and the client is also able to correct any errors faster, without reloading the page. Det er godt å validere e-postadresser rett på klientsiden, fordi du lagrer server ressurser forbruk og klienten er også i stand til å korrigere eventuelle feil raskere, uten å laste siden. But you should never avoid rechecking the email (and not only emails) on the server side. Men du aldri bør unngå kontrollert e (og ikke bare e-post) på tjenersiden.